Abstract: With the collapse of the Metaphysical world, the rapid development and expansion of modern technologies make people inevitably involved in the technological tide. As a result, human beings entered an age dominated by technology. In this age, modern technologies such as information technology, biotechnology and medical technology have pervaded all the fields of social life and are impacting the weak moral baseline of the moderns. In contrast with the rapid development of modem technologies, man continually encounters ethical dilemmas in the employment of them. The ethical dilemmas of modern technologies have a deep effect on the moral worldview of the moderns. Such dilemmas reveal the relativity of the morality and give rise to the spread of moral relativism.